Process for heating steel and tin plates.



V C. SMITH.

PROCESS FOR HEATING STEEL AND TIN PLATES.

- APPLICAHON FILED OCT. 1. 1915.

1% 11,635. V Patented Jan. 9,1917

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VICTOR o. SMITH, or WHEATLAND, rm msnvame raocsss ron HEATING STEEL AND m snares.

Specification of Letters Patent. P t ted J n, 5;, is 1%,

Application filed October 1,191; Serial no. 53,551.

To all whom it may concern: 1 \1 Be it known that I, VICTOR. C. citizen offthe' United States, residin Wheatland, in the county 'of Merce State of, Pennsylvania, 9 have r'finven tain new and useful Improveiii ntsicsscs for Heating .Steel and fl in Elites nd I do declare the following tobe a'fu as will enable others skilled in the art-to" which it appertain's to a e" and use the same. I

a process forlheatin This invention relates to a method or process for andtin. p

,The object of thc invention is toprovide steel and tin plate either in the-form'of ars or sheets in such a manner as to prevent the bars or plates of metal from .scalingand from sticking or 'welding together. 1

,the furnace and which 35.

' In the method ordinarily employed for heating tin or steel bars in a, gas furnace the great heat .employedand the oxygen of the airconta-ined in the furnace or annealing pot causes the bars or sheets to stick or weld together thereby causing more or less-tron desirable, air and gas may also be admitted to the chamber 5 through burners shown at ble to the workmen. Thesebars'also scale during sucli heating which detracts from the'quality of the finished product.

This invention is designed to overcome these objections and does so by taking up. or consuming the oxygen in the air confined in I produces the objections above referred to.

The methodemployed' for removing the oxygen from ,the atmosphere within the fur naee or annealing pot consists of the following steps :'placing in the furnace in which the bars of tin or steel are to be heated at any desired point, preferably at point where the heat is greatest, a soft metal, lead being preferably used which melts and boilsat a comparatively low temperature. 45'

melting of the lead confined ina receptacle generates lead oxid which takes up theoxygen from the air in the furnace and hence prevents the formation of scales and the Welding together of the bars or sheets of tin or steel being heated in said furnace. This melting of the leadalso reduces the temperature of the furnace at the'point where it is located and hence renders the temperature uniform,throughout the furnace.

In the accompanying drawing on appa- Sr/rrrrc, a: a k section; and, Figt 3--is iifffdetail transverse sectiontake n on thcline 3 of Fig. 2. I

In th'eembodiment of the apparatus illustratcd,"a furnace 1 is shown such as is ordi- 4 p jn'arily used for heating bars or sheets of and exact description of he invention, such heating bars orsheets of steel- This I natus isshown for carI'yiBgibnt'thiS method or process which Figure 1 -is a longitudinalvertical section; F g.2 is ahorizcntal steel or'tin and has the usual doors 2 at its front end for the insertion of the material to be heated, said doors being usually laced at the front end of the furnace, 'whi e the carry the material to be heated are designed to. travel enteringthrough the doors 2.

After these trucks are placed in the chamber 5 on the tracks 7 or rather before entering said chamber, box-likecovers 8 are placed on them over the metal to keep out the air and prevent it and the gas from coming in contact with the metal. If found necessary or 9 on the sides of the chamber and at the center thereof.

Receptacles 10' for holding the soft metal are designed to lee-secured to the back wall 4 of the furnace within the combustion chamber thereof and within the covers 8 which are placed over the metal to be heated.-

After the trucks containing themetal have been run. into the chamber 5 the doors 2 are closed and in view of the fact that 'these doors are arranged at the front end of the furnace, the heat within the furnace will be greatest at the rear thereof or at points spaced from the doors and 1ea' and at'the same time prevents the formation of scales on said bars thereby .preventing injury to the bars being heater The receptacles 10, it will be understood, are to be constructed of any suitable material ca at 1e ofwithstanding the heat to which they are to be subjected, being preferably made of metal covered with fire clay.

I claim as my invention:

1. A method of heating which consists in placing them in a furnace supplied with the necessary heat and consuming the oxygen from the atmosphere which is contained in the f urnace and surrounds the bars being treated.

2. A method ofheating metal bars which consists in placing them in a suitable furnace and subjecting them to the action of an atmosphere in which a soft. metal is melted and tin and steel bars boiled at a low temperature, theiiiby preventing sa-id bars from scaling andweldin 3. A method of heating metal bars whict consists in placing them in a furnace, supplying the necessary heat to said furnace for eating the bars to the desired extent, and melting and boiling lead within said furnace at a point where the heat is greatest,

whereby the temperature in the furnace is nesses. I

- VICTOR C. SMITH.

VWitnesses: I THos. D. Axms'rnoiw,

Nona Jo ce.

whereof I have hereunto set 

